Contents of /trunk/mkinitrd-magellan/busybox/coreutils/echo.c
Parent Directory | Revision Log
Revision 532 -
(show annotations)
(download)
Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 4711 byte(s)
Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 4711 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * echo implementation for busybox |
4 | * |
5 | * Copyright (c) 1991, 1993 |
6 | * The Regents of the University of California. All rights reserved. |
7 | * |
8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
9 | * |
10 | * Original copyright notice is retained at the end of this file. |
11 | */ |
12 | |
13 | /* BB_AUDIT SUSv3 compliant -- unless configured as fancy echo. */ |
14 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/echo.html */ |
15 | |
16 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
17 | * |
18 | * Because of behavioral differences, implemented configurable SUSv3 |
19 | * or 'fancy' gnu-ish behaviors. Also, reduced size and fixed bugs. |
20 | * 1) In handling '\c' escape, the previous version only suppressed the |
21 | * trailing newline. SUSv3 specifies _no_ output after '\c'. |
22 | * 2) SUSv3 specifies that octal escapes are of the form \0{#{#{#}}}. |
23 | * The previous version version did not allow 4-digit octals. |
24 | */ |
25 | |
26 | |
27 | #include <stdio.h> |
28 | #include <string.h> |
29 | #include <stdlib.h> |
30 | #include "busybox.h" |
31 | |
32 | int bb_echo(char **argv) |
33 | { |
34 | #ifndef CONFIG_FEATURE_FANCY_ECHO |
35 | #define eflag '\\' |
36 | ++argv; |
37 | #else |
38 | const char *p; |
39 | int nflag = 1; |
40 | int eflag = 0; |
41 | |
42 | while (*++argv && (**argv == '-')) { |
43 | /* If it appears that we are handling options, then make sure |
44 | * that all of the options specified are actually valid. |
45 | * Otherwise, the string should just be echoed. |
46 | */ |
47 | |
48 | if (!*(p = *argv + 1)) { /* A single '-', so echo it. */ |
49 | goto just_echo; |
50 | } |
51 | |
52 | do { |
53 | if (strrchr("neE", *p) == 0) { |
54 | goto just_echo; |
55 | } |
56 | } while (*++p); |
57 | |
58 | /* All of the options in this arg are valid, so handle them. */ |
59 | p = *argv + 1; |
60 | do { |
61 | if (*p == 'n') { |
62 | nflag = 0; |
63 | } else if (*p == 'e') { |
64 | eflag = '\\'; |
65 | } else { |
66 | eflag = 0; |
67 | } |
68 | } while (*++p); |
69 | } |
70 | |
71 | just_echo: |
72 | #endif |
73 | while (*argv) { |
74 | int c; |
75 | |
76 | while ((c = *(*argv)++)) { |
77 | if (c == eflag) { /* Check for escape seq. */ |
78 | if (**argv == 'c') { |
79 | /* '\c' means cancel newline and |
80 | * ignore all subsequent chars. */ |
81 | return 0; |
82 | } |
83 | #ifndef CONFIG_FEATURE_FANCY_ECHO |
84 | /* SUSv3 specifies that octal escapes must begin with '0'. */ |
85 | if (((unsigned int)(**argv - '1')) >= 7) |
86 | #endif |
87 | { |
88 | /* Since SUSv3 mandates a first digit of 0, 4-digit octals |
89 | * of the form \0### are accepted. */ |
90 | if ((**argv == '0') && (((unsigned int)(argv[0][1] - '0')) < 8)) { |
91 | (*argv)++; |
92 | } |
93 | /* bb_process_escape_sequence can handle nul correctly */ |
94 | c = bb_process_escape_sequence((const char **) argv); |
95 | } |
96 | } |
97 | putchar(c); |
98 | } |
99 | |
100 | if (*++argv) { |
101 | putchar(' '); |
102 | } |
103 | } |
104 | |
105 | #ifdef CONFIG_FEATURE_FANCY_ECHO |
106 | if (nflag) { |
107 | putchar('\n'); |
108 | } |
109 | #else |
110 | putchar('\n'); |
111 | #endif |
112 | return 0; |
113 | } |
114 | |
115 | int echo_main(int argc, char** argv) |
116 | { |
117 | (void)bb_echo(argv); |
118 | fflush_stdout_and_exit(EXIT_SUCCESS); |
119 | } |
120 | |
121 | /*- |
122 | * Copyright (c) 1991, 1993 |
123 | * The Regents of the University of California. All rights reserved. |
124 | * |
125 | * This code is derived from software contributed to Berkeley by |
126 | * Kenneth Almquist. |
127 | * |
128 | * Redistribution and use in source and binary forms, with or without |
129 | * modification, are permitted provided that the following conditions |
130 | * are met: |
131 | * 1. Redistributions of source code must retain the above copyright |
132 | * notice, this list of conditions and the following disclaimer. |
133 | * 2. Redistributions in binary form must reproduce the above copyright |
134 | * notice, this list of conditions and the following disclaimer in the |
135 | * documentation and/or other materials provided with the distribution. |
136 | * |
137 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change |
138 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> |
139 | * |
140 | * California, Berkeley and its contributors. |
141 | * 4. Neither the name of the University nor the names of its contributors |
142 | * may be used to endorse or promote products derived from this software |
143 | * without specific prior written permission. |
144 | * |
145 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
146 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
147 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
148 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
149 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
150 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
151 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
152 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
153 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
154 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
155 | * SUCH DAMAGE. |
156 | * |
157 | * @(#)echo.c 8.1 (Berkeley) 5/31/93 |
158 | */ |